CN212296556U

CN212296556U - Noise silencer

Info

Publication number: CN212296556U
Application number: CN202020945479.7U
Authority: CN
Inventors: 肖洛; 周小燕
Original assignee: Shanghai Tenneco Exhaust System Co Ltd
Current assignee: Shanghai Tenneco Exhaust System Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-01-05
Anticipated expiration: 2030-05-29

Abstract

A muffler comprises a shell, an inner pipe arranged in the shell and a connecting pipe connected with the inner pipe; the inner tube is provided with a flaring, the connecting tube is provided with a tapered cone part which is inserted into the flaring and is in transition fit with the inner surface of the flaring, the tapered cone part comprises a starting end and a tail end with the diameter smaller than that of the starting end, a gap g is formed between the outer surface of the starting end and the inner surface of the flaring, and the gap g is more than 0 and less than or equal to 0.6 mm. Compared with the prior art, the utility model has the advantages that the inclined cone part is arranged, so that the assembly difficulty of the connecting pipe and the flaring is reduced; in addition, the gap g between the outer surface of the starting end and the inner surface of the flaring is designed to be more than 0 and less than or equal to 0.6mm, so that the welding quality can be improved, and abnormal sound caused by welding slag falling into the silencer can be avoided.

Description

Noise silencer

Technical Field

The utility model relates to a silencer belongs to engine exhaust system technical field.

Background

A conventional muffler includes a housing, an inner pipe installed in the housing, and a connection pipe connected to the inner pipe, wherein a portion of the connection pipe is inserted into the inner pipe and fixed together by welding. However, how to design the welding gap between the connecting pipe and the inner pipe is a technical problem to be solved by those skilled in the art. Generally, the weld gap between the connection pipe and the inner pipe is designed to be relatively large for easy assembly. So design, welding defect appears easily on the one hand, and the welding slag that produces during the on the other hand welding falls into the inside of silencer easily, appears the abnormal sound problem because of the welding slag leads to easily.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can improve welding quality's silencer.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a muffler comprises a shell, an inner pipe arranged in the shell and a connecting pipe connected with the inner pipe; the inner tube is provided with a flaring, the connecting tube is provided with a tapered cone part which is inserted into the flaring and is in transition fit with the inner surface of the flaring, the tapered cone part comprises a starting end and a tail end with the diameter smaller than that of the starting end, a gap g is formed between the outer surface of the starting end and the inner surface of the flaring, and the gap g is more than 0 and less than or equal to 0.6 mm.

As a further improved technical solution of the present invention, a taper angle of the tapered portion between the starting end and the end is 5.1 °.

As a further improved technical scheme of the utility model, the initiating terminal with length between the end is 10 mm.

As the technical proposal of the further improvement of the utility model, the diameter difference between the outer diameter of the starting end and the outer diameter of the tail end is 1.8 mm.

As a further improved technical solution of the present invention, the casing includes a first end portion and a second end portion opposite to the first end portion, the one end of the inner tube is inserted and fixed in the first end portion, the other end of the inner tube is inserted and fixed in the second end portion, the one end of the inner tube is provided with the flaring.

As a further improved technical scheme of the utility model, the other end of inner tube is equipped with the binding off.

As a further improved technical solution of the present invention, the housing includes a first cylindrical housing to extend the first cone and the second cone formed at the two ends of the first housing, the first end portion is connected to the first cone, and the second end portion is connected to the second cone.

As a further improved technical solution of the present invention, the inner tube is provided with a plurality of sound holes located between the first end portion and the second end portion.

Compared with the prior art, the utility model has the advantages that the inclined cone part is arranged, so that the assembly difficulty of the connecting pipe and the flaring is reduced; in addition, the gap g between the outer surface of the starting end and the inner surface of the flaring is designed to be more than 0 and less than or equal to 0.6mm, so that the welding quality can be improved, and abnormal sound caused by welding slag falling into the silencer can be avoided.

Drawings

Fig. 1 is a schematic sectional view of the muffler of the present invention.

Fig. 2 is a partially enlarged view of circled portion a in fig. 1.

Fig. 3 is a partially enlarged view of the connection pipe of fig. 2.

Detailed Description

Referring to fig. 1 to 3, the present invention discloses a muffler 100, which includes a housing 1, an inner pipe 2 installed in the housing 1, and a connecting pipe 3 connected to the inner pipe 2.

In the illustrated embodiment of the present invention, the housing 1 includes a first cylindrical housing 11, a first taper 12 and a second taper 13 extending from both ends of the first housing 11, a first end 14 extending from the first taper 12, and a second end 15 extending from the second taper 13.

The inner tube 2 is provided with a flared end 21 at one end, a closed end 22 at the other end, and a plurality of sound holes 23 between the first end 14 and the second end 15. The flared end 21 is inserted into the first end 14 and the necked-in end 22 is inserted into the second end 15.

The connecting tube 3 is provided with a tapered portion 31 for insertion into the flared end 21 and transition fit with the inner surface of the flared end 21. The tapered portion 31 comprises a starting end 311 and a tail end 312 with a diameter smaller than that of the starting end 311, wherein a gap g is formed between the outer surface of the starting end 311 and the inner surface of the flared opening 21, and the gap g is more than 0 and less than or equal to 0.6 mm. The taper angle β of the tapered portion 31 between the starting end 311 and the ending end 312 is 5.1 °. The length L between the starting end 311 and the end 312 is 10 mm. The difference d between the outer diameter of the starting end 311 and the outer diameter of the end 312 is 1.8 mm.

Compared with the prior art, the utility model has the advantages that the inclined cone part 31 is arranged, so that the assembly difficulty of the connecting pipe 3 and the flaring 21 is reduced; in addition, the gap g between the outer surface of the starting end 311 and the inner surface of the flared end 21 is designed to be more than 0 and less than or equal to 0.6mm, so that the welding quality can be improved, and abnormal sound caused by welding slag falling into the silencer 100 can be avoided.

The above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the understanding of the present specification should be based on the technical personnel in the technical field, and although the present specification has described the present invention in detail with reference to the above embodiments, the skilled personnel in the art should understand that the technical personnel in the technical field can still modify or substitute the present invention, and all the technical solutions and modifications thereof that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A muffler comprises a shell, an inner pipe arranged in the shell and a connecting pipe connected with the inner pipe; the method is characterized in that: the inner tube is provided with a flaring, the connecting tube is provided with a tapered cone part which is inserted into the flaring and is in transition fit with the inner surface of the flaring, the tapered cone part comprises a starting end and a tail end with the diameter smaller than that of the starting end, a gap g is formed between the outer surface of the starting end and the inner surface of the flaring, and the gap g is more than 0 and less than or equal to 0.6 mm.

2. The muffler of claim 1, wherein: the taper angle of the tapered portion between the starting end and the end is 5.1 °.

3. The muffler of claim 1, wherein: the length between the starting end and the end is 10 mm.

4. The muffler of claim 1, wherein: the difference in diameter between the outer diameter of the starting end and the outer diameter of the end is 1.8 mm.

5. The muffler of claim 1, wherein: the shell comprises a first end portion and a second end portion opposite to the first end portion, one end of the inner tube is inserted and fixed into the first end portion, the other end of the inner tube is inserted and fixed into the second end portion, and the flaring is arranged at one end of the inner tube.

6. The muffler of claim 5, wherein: and the other end of the inner tube is provided with a closing-in.

7. The muffler of claim 5, wherein: the shell comprises a first cylindrical shell, a first cone and a second cone, wherein the first cone and the second cone are formed by extending from two ends of the first shell respectively, the first end portion is connected with the first cone, and the second end portion is connected with the second cone.

8. The muffler of claim 5, wherein: the inner tube is provided with a plurality of sound holes located between the first end and the second end.